Umlauts tft.println not working

Other Hardware Displays
1

Hi,
I have an ESP32-TTGO-T4 (BigDisplay) and want use tft.println for printing with umlauts,
but it did not work, can you assist for an example ?
Thank you.
Jenni

2

Check the character set of the display driver. Umlauts may have non-Unicode codes.

3

HI @applepi333,

if this page is true

https://github.com/fdufnews/ESP32-TTGO-T4/tree/master

you may use the Adafruit GFX lib.

If this is the case

  • you may have a look at this link

https://forums.adafruit.com/viewtopic.php?t=70719

  • and try this sketch (from the link above, I have not tested it and it may require some adaptation to your application!):
#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"

// For the Adafruit shield, these are the default.
#define TFT_DC 9
#define TFT_CS 10

// Use hardware SPI (on Uno, #13, #12, #11) and the above for CS/DC
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);
// If using the breakout, change pins as desired
//Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_MOSI, TFT_CLK, TFT_RST, TFT_MISO);

void setup() {
  Serial.begin(9600);
  Serial.println("ILI9341 Test!"); 
 
  tft.begin();
  tft.fillScreen(ILI9341_BLACK);
  tft.setCursor(0, 0);
  tft.setTextColor(ILI9341_WHITE);  tft.setTextSize(2);
 
  tft.println("  0123456789ABCDEF"); 
  for (int row = 0; row < 16; row++)
  {
    tft.print(row,HEX); tft.print(" ");
    for (int col = 0; col < 16; col++)
    {
      char c = row*16 + col;
      if ((c >= '\10') && (c <= '\13')) c = ' '; //don't print LF, VT, FF, CR
      tft.print(c);
    }
    tft.println();
  }
}

void loop() {}

The sketch should display the entire character set on the ILI9341 ...

Good luck!

4

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